/**
 * ${PROJECT_NAME}
 * ${YEAR}-${MONTH}-${DAY} ${HOUR}:${MINUTE}
 *
 * @author yy ${USER}
 * description : 不可描述
 * @date ${DATE} ${TIME}
 */
public class Main {
    public static void main(String[] args) {
        System.out.println("Hello world!");
    }
}